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受欢迎的代数 >

4x^2+9x=12x

解答

4 x^{2} + 9 x = 12 x

解答

x = \frac{3}{4}, x = 0

+1

十进制

x = 0.75, x = 0

求解步骤

4 x^{2} + 9 x = 12 x

将

12 x

para o lado esquerdo

4 x^{2} - 3 x = 0

使用求根公式求解

x_{1, 2} = \frac{- ( - 3 ) \pm ( - 3 ) ^{2} - 4 \cdot 4 \cdot 0}{2 \cdot 4}

(- 3)^{2} - 4 \cdot 4 \cdot 0 = 3

x_{1, 2} = \frac{- ( - 3 ) \pm 3}{2 \cdot 4}

将解分隔开

x_{1} = \frac{- ( - 3 ) + 3}{2 \cdot 4}, x_{2} = \frac{- ( - 3 ) - 3}{2 \cdot 4}

x = \frac{- ( - 3 ) + 3}{2 \cdot 4} : \frac{3}{4}

x = \frac{- ( - 3 ) - 3}{2 \cdot 4} : 0

二次方程组的解是:

x = \frac{3}{4}, x = 0

作图

流行的例子

(5 x + 6)^{2} - 3 = 50

3(5x+5)^2-47=10

3 (5 x + 5)^{2} - 47 = 10

4 a^{2} = 4

(x + 2) (x + 5) = 0

2 x^{2} - 12 x + 18 = 32